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樓主  發(fā)表于: 2013-08-06 17:03
想請教一下，公司PLC柜內模擬量模塊接線(xiàn)上都加了0.25A保險管目的是為了防止有異常電流輸入燒模塊。設備已經(jīng)用了5、6年了。近期發(fā)現本來(lái)是好的保險管在拔出的一瞬間就燒了。百思不解。設備用的大部分都是二線(xiàn)制變送器

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